Internal-combustion engine.



ma. 815,492. y

I PATBNTED MAR. zo, 1901;?r r, MqUHLBR. l lINTERNAL GOMBUSTION ENGINE.

n'rmoulox num Dnc. as, 1904 2 sums-snm WNW k l. i i i Witnesses f5. n I ,if

. N f PpMgUNLBml n INTERNAL GOMBUSTION ENGINE.

APVPLIO'ATIO FILED DBC. 23,].904v

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/l/ (l v o p20 f 'PATBNTED MAR. 2 0, 1966. .I

. n UNrriii) sTATESj/ATENT oriren f 'ro .GEORGE citizen of the United lStates, residin at Lin- 'taken up, the end thrusts in opposite .Ish

' InternalCombustion' Engine,

` parts, by removing all State of have iinv'enteda new and useful or which the.

coln, in the county of Lancaster lan Nebraska,

following is a specification.

This invention relates to internalfcombiistion engines, andhas for its rincipal objecty to rovide an engineof simp e and'economica construction wherein all `vibration be f e0.- tions being neutralized by a pair of oppositely-moving pistons disposedin the same cylinder.'y v v Ay further object of the invention is. to improve and simplify .the construction of this". class lof devices by lessenin the number 'of of t e inlet and exaust valves' commonly employed, and by so arranging the. parts ,that the engine may be lubricated conveniently and' thoroughlyand may bereadily re will more fully hereinafter a tionconsists aired when necessary. other objects in view, as

ear, the invenin certain nove geatures of construction. andV arran ement of arts 4herein- With *these an after fully described, illustratediin the accomy portions,

- ture may panying drawings, andpart'cularly pointed out in the appended claim, it being understood that lvarious changes in the form, pro# size, and minor details of the strucb'e made without departing .from the spirit or sacrificingL any of the advantages of the invention. i

In the accompanying drawings, Figure -1 is.-

f a sectional elevation of an internal-combustion engine `constructed in accordance. with the invention. Fig. 2 is an end elevation of the same. Fig. 31s a sectional view of the engine cylinder and. iston, illustrating a sli ht modification oft e invention.

' imilar numerals. of reference are employed to g indicate corresponding, ar'ts throughout thel several -figures ofthe awin s. y

g["he en 'ne-frame includes a base or bed 10,

g that is `rovided with standards 1:1, at the top of whic are suitable bearings for the sup "ort of a double crank-shaft12. Suitable alf ance-wheels 13 are provided at the .opposite ends of the shaft 12,- as usual, and one or both ofl these may be employed as belt-wheels for' r the transmission of power..

by heads 16, carrying stu FBANcisQi/i;UHLEaoF LiNcoL'N, NEBRASKA, Ass'IGNoRo'ii oNE- fiiiiiii .puiser LiNcoLN,NiiBRAsKA; l

iNTEnNAL-ooM-BUISTION ENGINE.-

i i iateht innen 2o, iaoa I The base or bea forms a support for a c 1-l luder-1 5, the central portion-of whichis isosed immediately under the crank-shaft.

he opposite ends of this c linder are closed l ng-b'oxes 17 of any ordinaryk construction, and the c linder 1s. provided witha water-jacket 1 8, t rough which water maybel circulated in lthe usual vmanner.l ".In the'cylinder are arranged two.

hollow pistons 20, each'carrying. aA pin 21, on

which is fulcrumed one end of a connecting-Av bar 22; The opposite end of the bar is con-- ne'cted to one arm of a lever 23', and th'e oppo` n site arm of the latter is connected by a rodr24 vto 'one of the cranks ofthe crank-shaft.l` The cranks .are arranged at diametrically oppo site points, and the pistons move toward and from each other.

cured les the 4connecting-rod 22. The. outeurportion of the tube v passesthrough the st bok 17, and thediameter of said tube is suc 'that erfect freedom o f movement is permit- 'ted uring the slight vertical 'play of the outer portion of. said connecting-rod. ,'The.

` In the outer'end of eachv piston is secured 4'a ring 2 5, and to this Ais se the inner end of a t'ube-` 26, that encir` space between the two pistons forms a compression and eXplosion 'chamber,.-

pumping -spaces into 4 which the explosive compression-stroke.

Leading into each of the cylinders isan in- -let-port 28, through which the explosive mixp gov turepasses, the port being so located that during the inward compressionfstroke of the andl the f 'space between the opposite faces of the pis# tons and the heads of the vcylinder`form .8,5 .mixture is drawn as the pistons return on the piston a partial vacuum will be created in the '4 outerend of the cilinder, and as, soon as the covered t p ow through such port and fill .the

On the outward stroke of the P'kilSr quic y cylinder.v ton the ex passage 3 1, that communicates through one or more ports 32 with one end .of the explosioneexplosive mix-ture will isv losive com-pound from both cylinyders will e forced through y'ports 30 into a roo chamber ofthe engine, this ort 32 being'uncovered when the piston asire'ached the. f

limit of its outward movement, and the inletport may be considered as one terminus of the explosion chamber. At the opposite endof the explosion-chamber is an esca eport 33 of much larger area than the et` port, andit is uncovered innadvance of the i cylinder.

- to be ignited by a spar opening of said inlet-port, so that the exp oded gases may pass more quickly from the The direct passage of the incoming explosive mixture from the inlet-port 32 to the discharge-port 33 is prevented by de- :Electors 35, which cause the incoInin gases to travel in a swirling path that will c ear the cylinder of the gases exploded by the pre-V 4 cylinders through the ports 30 into the passage or passages 31. y When the pistons reach or nearly reach thelimit of their outward movement, the exhaust-port 33 wi ll be opeed and a portion of the exploded gases willinstantly escape. Slight further outward movement will then uncover the inlet port orports 32, andthe gases willpass through said ports and strike against the deiectors 35, and traveling in a ploded gases towardthe exhaust port 33.

-On the reversal of the movement of the pistons the gases will be compressed until the las inders, are

pistons again assume the position shown in Fi 1, atwhich time the-second explosion Wi l occur. During the second inward movement of the pistons vacuums or partial vacuums will be formed in the outer ends of the cylinder, and as soon as the ports 28 are uncovered a fresh quantity of explosivecharge Will fill theouter ends of said cylinders.

In Fig. 3 is illustrated a sli ht modification of the invention, wherein-t e structure remains precisely the same as that previously described, with the exception that a suction inlet-valve 40 is arranged in communication with the assage 31'; but in this case the ports 28', eading to the outer endspf the cylat the extreme ends of said cylinders, the device operating on the suctionstroke to draw in a charge to be subsequently compressed and exploded.

It will be seen that all superfluous valves parts and simp ig. l are at the end of the inward' its opposite ends, stuffing-boxes swirling path will drive the ex sienes and other members have been discarded and that by reducing the number of working hying the contruction of the engine there is less likelihood of break downs and repairs, and at the same time by so arranging the pistons that they simultaneous move in opposite directions, respectively,

mobiles, launches, and like structures Where rspid vibration from the engine is not desir.- a e. Havin thus described the invention, what is claime is- The combination in an internal-combustion engine, of a frame, a crank-shaft 'ournaled in said frame, a cylinder arrange be-l low the shaft, said-cylinder having heads at carried by the heads, a pair of pistons arrangedin said cylinder and movable in opposite directions, respectively, tubes connected to the outer faces of the pistons and leading through said s tufling vided Into a central explosion-chamber and end pumping-chambers, inlets through which the explosive mixture may pass to the end pumping-chambers when the pistons are at the limit of instroke, ports leadin from Said pumpin -chambers and connectefgi to a port that is p aced in communication with the central ex losion-chamber', when the pistons are at the imit of outstroke, one of the-pistons controlling the inlet-port, and an exhaustport leading from the combustion-chamber and controlled by the opposite piston, the ports bein disposed, respectively, at opposite ends o said explosion-chamber, connectin -rods leading from the pistons through the tuIIular portions thereof, brackets extendin outward from the frame to points beyond the ends of the cylinder, .levers pivotedvon said brackets, the lower arms'of said levers being connected tothe rods, and upper'rods extending from the upper arms of saId levers to the crank-shaft.

In testimony that I claim the foregoing as my own I have heretoaixed my signature in the presence oftwoA witnesses.

` FRANCIS M. UHLER. Witnesses:

JOHN KRIEG, MORRISON H. CHRISTY.

i 6o -end thrust and vibration is taken up and the engine may be used to advantage on auto-t boxes, the cylinder being thus `di IOO 

